Agirl found the skull of an animal. she didn't know what the animal was, but she was sure it preyed on other animals for its food. what could have led her to this conclusion?

Explain why phospholipid molecules form a bilayer. (3 marks)

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

How energy move through ecosystem ?